Only optimize (a - (-b)) into (a + b) when the unary operand is a negation. This...

[xonotic/gmqcc.git] / doc / gmqcc.1

diff --git a/doc/gmqcc.1 b/doc/gmqcc.1
index 185092e4c8c910a0bc13b4f01fdfa75cc32217b2..7ee54c01cab814924cbc17f04fa67e903cd08b86 100644 (file)
--- a/doc/gmqcc.1
+++ b/doc/gmqcc.1
@@ -153,7 +153,7 @@ Adds compiler information to the generated binary file. Currently
 this includes the following globals:
 .Bl -tag -width indent -compact
 .It Li reserved:version
-String containing the compiler version as printed by the --version
+String containing the compiler version as printed by the \-\-version
 parameter.
 .El
 .It Fl -correct , Fl -no-correct
@@ -336,6 +336,14 @@ When compiling original QuakeWorld QC there are instances where
 code overwrites constants. This is considered an error, however
 for QuakeWorld to compile it needs to be treated as a warning
 instead, as such this warning only works when -std=qcc.
+.It Fl W Ns Cm directive-inmacro
+Warn about the use of preprocessor directives inside macros.
+.It Fl W Ns Cm builtins
+When using a function that is not explicitly defined, the compiler
+will search its intrinsics table for something that matches that
+function name by appending "__builtin_" to it. This behaviour may
+be unexpected, so enabling this will produce a diagnostic when
+such a function is resolved to a builtin.
 .El
 .Sh COMPILE FLAGS
 .Bl -tag -width Ds
@@ -356,7 +364,7 @@ features used in the Xonotic codebase. If you need more, write a
 ticket.
 .It Fl f Ns Cm ftepp-predefs
 Enable some predefined macros. This only works in combination with
-\'-fftepp' and is currently not included by '-std=fteqcc'. The
+\'\-fftepp' and is currently not included by '\-std=fteqcc'. The
 following macros will be added:
 .Bd -literal -offset indent
 __LINE__
@@ -389,6 +397,26 @@ only the first component will be 0, while the other two will become
 the first to of the global return value. This behavior is odd and
 relying on it should be discouraged, and thus is not supported by
 gmqcc.
+.It Fl f Ns Cm ftepp-mathdefs
+Enable math constant definitions. This only works in combination
+with \'\-fftepp' and is currently not included by '\-std=fteqcc'.
+The following macros will be added:
+.Bd -literal -offset indent
+M_E
+M_LOG2E
+M_LOG10E
+M_LN2
+M_LN10
+M_PI
+M_PI_2
+M_PI_4
+M_1_PI
+M_2_PI
+M_2_SQRTPI
+M_SQRT2
+M_SQRT1_2
+M_TAU
+.Ed
 .It Fl f Ns Cm relaxed-switch
 Allow switch cases to use non constant variables.
 .It Fl f Ns Cm short-logic
@@ -678,7 +706,7 @@ A documented example for a gmqcc.ini file.
 .Sh AUTHOR
 See <http://graphitemaster.github.com/gmqcc>.
 .Sh BUGS
-Currently the '-fftepp-predefs' flag is not included by '-std=fteqcc',
+Currently the '\-fftepp-predefs' flag is not included by '\-std=fteqcc',
 partially because it is not entirely conformant to fteqcc.
 .Pp
 Please report bugs on <http://github.com/graphitemaster/gmqcc/issues>,